Home / 128,722,285.20-193,083,427.80-87,907,616.40

Finding the Fourth Proportional to 128,722,285.20, 193,083,427.80 and 87,907,616.40

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Solution

The fourth proportional to 128,722,285.20, 193,083,427.80 and 87,907,616.40 is: 131,861,424.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,722,285.20 : 193,083,427.80 = 87,907,616.40 : x
  2. Step 2: Convert to fraction form
    128,722,285.20/193,083,427.80 = 87,907,616.40/x
  3. Step 3: Cross multiply
    128,722,285.20x = 193,083,427.80 × 87,907,616.40
  4. Step 4: Simplify right side
    128,722,285.20x = 16,973,503,904,239,498
  5. Step 5: Solve for x
    x = 16,973,503,904,239,498/128,722,285.20
  6. Step 6: Final answer
    x = 131,861,424.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.